import os, sys

print("---- ENV CHECK ----")
print("QGIS_PREFIX_PATH:", os.environ.get("QGIS_PREFIX_PATH"))
print("PROJ_LIB:", os.environ.get("PROJ_LIB"))
print("GDAL_DATA:", os.environ.get("GDAL_DATA"))
print("QT_PLUGIN_PATH:", os.environ.get("QT_PLUGIN_PATH"))

import glob

print("\n--- SEARCH proj.db in QGIS PREFIX ---")
print(glob.glob("/Applications/QGIS-LTR.app/**/proj.db", recursive=True))


print("\n--- CHECK FILE EXISTS ---")
print("proj.db exists? ", os.path.isfile(os.path.join(os.environ["PROJ_LIB"], "proj.db")))


QGIS_APP = "/Applications/QGIS-LTR.app/Contents"
QGIS_PREFIX = f"{QGIS_APP}/Resources"

os.environ["QGIS_PREFIX_PATH"] = QGIS_PREFIX
sys.path.append(f"{QGIS_PREFIX}/python")
sys.path.append(f"{QGIS_PREFIX}/python/plugins")

from qgis.core import QgsApplication, QgsVectorLayer

qgs = QgsApplication([], False)
qgs.initQgis()

uri = (
    "dbname='gisdb' host=localhost port=5432 user='postgres' password='postgres' "
    "table=\"public\".\"dataset_metadata\" key='id' srid=4326"
)

layer = QgsVectorLayer(uri, "test", "postgres")

print("Valid:", layer.isValid())
print("Provider:", layer.providerType())
print("Error summary:", layer.error().summary())

qgs.exitQgis()